fix pic zoom function and upload a pic for unitV Quick Start

docs/assets/css/main.css

@@ -6,6 +6,11 @@ a {
     text-decoration: none !important;  
 }
 
+img {
+
+    z-index: 51;
+}
+
 /* .content {
     background-color: #ececec;;
 } */
@@ -308,7 +313,7 @@ div.card-img-overlay:hover {
 
 
 .d-flex {
-    z-index: 1000;
+    z-index: 50;
     position: fixed;
     top: 0;
     right: 0;

docs/en/quick_start/unitv/unitv_quick_start.md

@@ -247,6 +247,8 @@ V-Training is an online recognition model training service customized for K210 s
 
 >After the UnitV is powered, it will run the boot program in SD by default to automatically recognize it. After adding the serial printing program, you can use the serial debugging tool to check the identification information.
 
+<img src="assets\img\getting_started_pics\unitv\unitv_qs4.jpg" width="60%">
+
 
 ## Library
 

docs/index.md

@@ -389,6 +389,10 @@
         }
   }  
 } 
+
+
+scrollFunc();
+
 /*IE、Opera注册事件*/
 if(document.attachEvent){
   document.attachEvent('onmousewheel',scrollFunc);

docs/zh_CN/README.md

@@ -390,6 +390,9 @@
       // }
   }  
 } 
+
+scrollFunc();
+
 /*IE、Opera注册事件*/
 if(document.attachEvent){
   document.attachEvent('onmousewheel',scrollFunc);

docs/zh_CN/quick_start/unitv/unitv_quick_start.md

@@ -244,7 +244,9 @@ V-Training 是由M5Stack推出的一个针对K210系列产品而定制的在线
 >UnitV在供电后，会默认运行SD中的boot程序，自动进行识别。添加了串口打印程序后，你可以使用串口调试工具，进行识别信息查看。
 
 
-## 程序库
+<img src="assets\img\getting_started_pics\unitv\unitv_qs4.jpg" width="60%">
+
+## 程序库   
 
 在程序库文档中，你可以找到更多的API，方便你搭建各式各样的应用。